Gary Milton Sr.Karen DuBois

Van Buren Technology Center

CTE Concepts CS (Cutting Speeds)Math Concepts: Calculations

Math-in-CTE Lesson Plan TemplateLesson Title: The effects of CS on RPM Lesson # M02

Author(s): Phone Number(s): E-mail Address(es):Gary A. Milton Sr 207-868-5274 garyvbhs@yahoo.com

Karen DuBois 207-868-5274 kdubois6@yahoo.com

Occupational Area: Machine Tool Technology

CTE Concepts CS (cutting speeds)

Math Concepts: Calculations

Lesson Objective: Show how cutting speeds affects the RPM setting while machining on a lathe

Supplies Needed: Speeds and Feed table 47-1

THE "7 ELEMENTS" TEACHER NOTES(and answer key)

1. Introduce the CTE lesson. We must first have an understanding that there is many math concepts that must be first taught and understood before anyone can begin to operate a metal lather safely. Today’s lesson will focus on how CS effects RPM.

Today’s lesson will be how Cutting Speed (CS) affects the initial RPM setting on the lathe. This difference is extremely important in setup as well as in the final operation of a machine. There are a number of factors that must be considered when determining the correct cutting speed. Material used in the cutting tool itself, the material that is being cut and rigidity of the work piece, just to name a few. Inappropriate cutting speeds can also cause tool burnout.

Show table 47-1 Speeds and feed chart.

Show student running metal lathe.

The words in red are vocabulary words for this lesson that are covered previous to this lesson so they are prepared for them and can recognize the key words.

Lathe Cutting Speeds in Feet and Meters per MinuteUsing a High-Speed Steel Toolbit

Table 47-1

Rough Cut Finish Cut ThreadingMaterial ft/min m/min ft/min m/min ft/min m/minTool Steel 70 21 90 27 30 9Cast Iron 60 18 80 24 25 8Machine Steel 90 27 100 30 35 11Bronze 90 27 100 30 25 8Aluminum 200 61 300 93 60 18

Feeds for Various Materials (Using a High-Speed Steel Cutting Tool)Table 47-2 Rough Cuts

In.Rough Cuts

mmFinish Cuts

In.Finish Cuts

mmMachine Steel .010-.020 0.25-0.5 .003-.010 0.07-0.25Tool Steel .010-.020 0.25-0.5 .003-.010 0.07-0.25Cast iron .015-.025 0.4-0.65 .005-.012 0.13-0.30Bronze .015-.025 0.4-0.65 .003-.010 0.07-0.25Aluminum .015-.030 0.4-0.75 .005-.010 0.13-0.25

Machine Time Calculations RPMTime = Distance/Rate

Where distance = length of cutRate = feed x rpm

CS x 4 / Diameter

Krar, S. & Check, A. (1997). Technology of Machine Tools %th. ed). Glencoe/McGraw-Hill. Waterville, OH.

Math-in-CTE Lesson Plan TemplateLesson Title: The effects of CS on RPM Lesson # M02

Author(s): Phone Number(s): E-mail Address(es):Gary A. Milton Sr 207-868-5274 garyvbhs@yahoo.com

Karen DuBois 207-868-5274 kdubois6@yahoo.com

Occupational Area: Machine Tool Technology

CTE Concepts CS (cutting speeds)

Math Concepts: Calculations

Lesson Objective: Show how cutting speeds affects the RPM setting while machining on a lathe

Supplies Needed: Speeds and Feed table 47-1

THE "7 ELEMENTS" TEACHER NOTES(and answer key)

1. Introduce the CTE lesson. We must first have an understanding that there is many math concepts that must be first taught and understood before anyone can begin to operate a metal lather safely. Today’s lesson will focus on how CS effects RPM.

Today’s lesson will be how Cutting Speed (CS) affects the initial RPM setting on the lathe. This difference is extremely important in setup as well as in the final operation of a machine. There are a number of factors that must be considered when determining the correct cutting speed. Material used in the cutting tool itself, the material that is being cut and rigidity of the work piece, just to name a few. Inappropriate cutting speeds can also cause tool burnout.

Show table 47-1 Speeds and feed chart.

Show student running metal lathe.

The words in red are vocabulary words for this lesson that are covered previous to this lesson so they are prepared for them and can recognize the key words.

Math-in-CTE Lesson Plan TemplateLesson Title: The effects of CS on RPM Lesson # Mo2

Author(s): Phone Number(s): E-mail Address(es):Gary A. Milton Sr. 207-868-5274 garyvbhs@yahoo.com

Karen DuBois 207-868-5274 kdubois6@yahoo.com

Occupational Area: Machine Tool Technology

CTE Concepts CS (cutting speeds)

Math Concepts: Calculations

Lesson Objective: Show how cutting speeds affects the RPM setting while machining on a lathe

Supplies Needed: Speeds and Feed table 47-1

THE "7 ELEMENTS" TEACHER NOTES(and answer key)

1. Introduce the CTE lesson. We must first have an understanding that there is many math concepts that must be first taught and understood before anyone can begin to operate a metal lather safely. Today’s lesson will focus on how CS effects RPM.

Today’s lesson will be how Cutting Speed (CS) affects the initial RPM setting on the lathe. This difference is extremely important in setup as well as in the final operation of a machine. There are a number of factors that must be considered when determining the correct cutting speed. Material used in the cutting tool itself, the material that is being cut and rigidity of the work piece, just to name a few. Inappropriate cutting speeds can also cause tool burnout.

Show table 47-1 Speeds and feed chart.

Show student running metal lathe.

The words in red are vocabulary words for this lesson that are covered previous to this lesson so they are prepared for them and can recognize the key words.

2. Assess students’ math awareness as it relates to the CTE lesson.

In the past you have learned how to interpret the charts on a metal lathe to acquire the information necessary to produce your part, from the safety quiz hand out sheet could you give me the number correlating to spindle speeds? Feed and Speeds? Threading chart?Can anyone explain what CS actually is? Having already completed a couple of projects to date can anyone tell me where they would go to find the information required to begin calculating the RPM for a project? What other information do you need to know so you can calculate RPM? Does material identification matter to your ability to do your math equations?

Show Jet Gh114w-3 safety quiz.

Cutting speed is the distance the work moves past the tool, expressed in feet per minute.

The students should be able to go and retrieve the information from the book on table 47 – 1, at this point they are ready to continue.

They should also be able to recognize the importance of a rough cut feed vs. a finish cut feed rate.

They should also have the ability to recognize the basic differences in materials so they can choose the correct cutting speed.

3. Work through the math example embedded in the CTE lesson.

The math formula for calculating RPM is CS x 4 / D where RPM = Revolutions per minute CS = Cutting Speed D = Diameter of work in inches Cutting speed for machine steel is 90 ft per minute, taken directly from the speeds and feed chart and your asked for a rough cut finish. Keep in mind that the speeds shown in Table 47 – 1, Speeds and Feed, should only be considered a starting point. Depending on machine condition, they may have to be increased or decreased until optimum cutting conditions are obtained

Show Table 47 -1 Lathe Cutting Speeds

Rough cut finish = .010 to .020

RPM = 90 x 4 / 3

RPM = 120

Items in blue are feed rates that are determined from the same chart, Table 47 – 1. These feed rates are based on a how you are looking for the end appearance of your part after you take a cut.

For extra remedial work, go to Table 47-1, page 1.

Show Table 47 – 1, page 1.

Jet GH1140W-3

Safety Quiz

2. Assess students’ math awareness as it relates to the CTE lesson.

In the past you have learned how to interpret the charts on a metal lathe to acquire the information necessary to produce your part, from the safety quiz hand out sheet could you give me the number correlating to spindle speeds? Feed and Speeds? Threading chart?Can anyone explain what CS actually is? Having already completed a couple of projects to date can anyone tell me where they would go to find the information required to begin calculating the RPM for a project? What other information do you need to know so you can calculate RPM? Does material identification matter to your ability to do your math equations?

Show Jet Gh114w-3 safety quiz.

Cutting speed is the distance the work moves past the tool, expressed in feet per minute.

The students should be able to go and retrieve the information from the book on table 47 – 1, at this point they are ready to continue.

They should also be able to recognize the importance of a rough cut feed vs. a finish cut feed rate.

They should also have the ability to recognize the basic differences in materials so they can choose the correct cutting speed.

3. Work through the math example embedded in the CTE lesson.

The math formula for calculating RPM is CS x 4 / D where RPM = Revolutions per minute CS = Cutting Speed D = Diameter of work in inches Cutting speed for machine steel is 90 ft per minute, taken directly from the speeds and feed chart and your asked for a rough cut finish. Keep in mind that the speeds shown in Table 47 – 1, Speeds and Feed, should only be considered a starting point. Depending on machine condition, they may have to be increased or decreased until optimum cutting conditions are obtained

Show Table 47 -1, Lathe Cutting Speeds

Rough cut finish = .010 to .020

RPM = 90 x 4 / 3

RPM = 120

Items in blue are feed rates that are determined from the same chart, Table 47 – 1. These feed rates are based on a how you are looking for the end appearance of your part after you take a cut.

For extra remedial work, go to Table 47-1, page 1.

Show Table 47 – 1, page 1.

Lathe Cutting Speeds in Feet and Meters per MinuteUsing a High-Speed Steel Toolbit

Rough Cut Finish Cut ThreadingMaterial ft/min m/min ft/min m/min ft/min m/minTool Steel 70 21 90 27 30 9Cast Iron 60 18 80 24 25 8Machine Steel 90 27 100 30 35 11Bronze 90 27 100 30 25 8Aluminum 200 61 300 93 60 18

Feeds for Various Materials (Using a High-Speed Steel Cutting Tool)Table 47-2 Rough Cuts

In.Rough Cuts

mmFinish Cuts

In.Finish Cuts

mmMachine Steel .010-.020 0.25-0.5 .003-.010 0.07-0.25Tool Steel .010-.020 0.25-0.5 .003-.010 0.07-0.25Cast iron .015-.025 0.4-0.65 .005-.012 0.13-0.30Bronze .015-.025 0.4-0.65 .003-.010 0.07-0.25Aluminum .015-.030 0.4-0.75 .005-.010 0.13-0.25

Machine Time Calculations RPMTime = Distance/Rate

Where distance = length of cutRate = feed x rpm

CS x 4 / Diameter

Krar, S. & Check, A. (1997). Technology of Machine Tools 5th. ed). Glencoe/McGraw-Hill. Waterville, OH.

2. Assess students’ math awareness as it relates to the CTE lesson.

In the past you have learned how to interpret the charts on a metal lathe to acquire the information necessary to produce your part, from the safety quiz hand out sheet could you give me the number correlating to spindle speeds? Feed and Speeds? Threading chart?Can anyone explain what CS actually is? Having already completed a couple of projects to date can anyone tell me where they would go to find the information required to begin calculating the RPM for a project? What other information do you need to know so you can calculate RPM? Does material identification matter to your ability to do your math equations?

Show Jet Gh114w-3 safety quiz.

Cutting speed is the distance the work moves past the tool, expressed in feet per minute.

The students should be able to go and retrieve the information from the book on table 47 – 1, at this point they are ready to continue.

They should also be able to recognize the importance of a rough cut feed vs. a finish cut feed rate.

They should also have the ability to recognize the basic differences in materials so they can choose the correct cutting speed.

3. Work through the math example embedded in the CTE lesson.

The math formula for calculating RPM is CS x 4 / D Where RPM = Revolutions per minute CS = Cutting Speed D = Diameter of work in inches Cutting speed for machine steel is 90 ft per minute, taken directly from the speeds and feeds chart and your asked for a rough cut finish. Keep in mind that the speeds shown in Table 47 – 1, Speeds and Feed, should only be considered a starting point. Depending on machine condition, they may have to be increased or decreased until optimum cutting conditions are obtained

Show Table 47 -1, Lathe Cutting Speeds

Rough cut finish = .010 to .020

RPM = 90 x 4 / 3

RPM = 120

Items in blue are feed rates that are determined from the same chart, Table 47 – 1. These feed rates are based on a how you are looking for the end appearance of your part after you take a cut.

For extra remedial work, go to Table 47-1, page 1.

Show Table 47 – 1, page 1.

Lathe Cutting Speeds in Feet and Meters per MinuteUsing a High-Speed Steel Toolbit

Rough Cut Finish Cut ThreadingMaterial ft/min m/min ft/min m/min ft/min m/minTool Steel 70 21 90 27 30 9Cast Iron 60 18 80 24 25 8Machine Steel 90 27 100 30 35 11Bronze 90 27 100 30 25 8Aluminum 200 61 300 93 60 18

Feeds for Various Materials (Using a High-Speed Steel Cutting Tool)Table 47-2 Rough Cuts

In.Rough Cuts

mmFinish Cuts

In.Finish Cuts

mmMachine Steel .010-.020 0.25-0.5 .003-.010 0.07-0.25Tool Steel .010-.020 0.25-0.5 .003-.010 0.07-0.25Cast iron .015-.025 0.4-0.65 .005-.012 0.13-0.30Bronze .015-.025 0.4-0.65 .003-.010 0.07-0.25Aluminum .015-.030 0.4-0.75 .005-.010 0.13-0.25

Machine Time Calculations RPMTime = Distance/Rate

Where distance = length of cutRate = feed x rpm

CS x 4 / Diameter

Krar, S. & Check, A. (1997). Technology of Machine Tools 5th. ed). Glencoe/McGraw-Hill. Waterville, OH.

Rough Cut Finish = .010 to .020Material – Machine Steel RPM = CS x 4 / 3 90 x 4 / 3 = RPM = 120

Rough Cut Finish Cut ThreadingMaterial ft/min m/min ft/min m/min ft/min m/minTool Steel 70 21 90 27 30 9Cast Iron 60 18 80 24 25 8Machine Steel 90 27 100 30 35 11Bronze 90 27 100 30 25 8Aluminum 200 61 300 93 60 18

Feeds for Various Materials (Using a High-Speed Steel Cutting Tool)

Table 47-2Rough Cuts

In.Rough Cuts

mmFinish Cuts

In.Finish Cuts

mm

Machine Steel .010-.020 0.25-0.5 .003-.010 0.07-0.25Tool Steel .010-.020 0.25-0.5 .003-.010 0.07-0.25Cast iron .015-.025 0.4-0.65 .005-.012 0.13-0.30Bronze .015-.025 0.4-0.65 .003-.010 0.07-0.25Aluminum .015-.030 0.4-0.75 .005-.010 0.13-0.25

Krar, S. & Check, A. (1997). Technology of Machine Tools %th. ed). Glencoe/McGraw-Hill. Waterville, OH.

2. Assess students’ math awareness as it relates to the CTE lesson.

In the past you have learned how to interpret the charts on a metal lathe to acquire the information necessary to produce your part, from the safety quiz hand out sheet could you give me the number correlating to spindle speeds? Feeds and Speeds? Threading chart?Can anyone explain what CS actually is? Having already completed a couple of projects to date can anyone tell me where they would go to find the information required to begin calculating the RPM for a project

Show Jet Gh114w-3 safety quiz.

Cutting speed is the distance the work moves past the tool, expressed in feet per minute.

The students should be able to go and retrieve the information from the book on table 47 – 1, at this point they are ready to continue.

3. Work through the math example embedded in the CTE lesson.

The math formula for calculating RPM is CS x 4 / D Where RPM = Revolutions per minute CS = Cutting Speed D = Diameter of work in inches Cutting speed for machine steel is 90 ft per minute, taken directly from the speeds and feeds chart and your asked for a rough cut finish. Keep in mind that the speeds shown in Table 47 – 1, Speeds and Feed, should only be considered a starting point. Depending on machine condition, they may have to be increased or decreased until optimum cutting conditions are obtained.

Show Table 47 -1, Lathe Cutting Speeds

Rough cut finish = .010 to .020

RPM = 90 x 4 / 3

RPM = 120

Items in blue are feeds rates that are determined from the same chart, Table 47 – 1 the middle table for feed rates. These feed rates are based on a how you are looking for the end appearance of your part after you take a cut. For extra remedial work if necessary look at Table 47 -1, page 1. Show Table 47 -1 page 1

Using the above charts calculate the proper feed and speeds for the following problems using a HSS Tool Bit.1. Face off one end of a 2” diameter tool steel shaft, then turn the end of that shaft to a diameter of 1.875 by 5.000 long.

Then turn the 1.875 diameter to a diameter of 1.250 by .687 long, on one end of the shaft. Calculate the RPM, for a rough cut process. Show all work.

2. Face off the end of a .500 tool steel shaft, then turn the diameter to .437 by .750 long. Calculate RPM for a finish cut

process. Show all work.

Rough Cut Finish Cut ThreadingMaterial ft/min m/min ft/min m/min ft/min m/minTool Steel 70 21 90 27 30 9Cast Iron 60 18 80 24 25 8Machine Steel 90 27 100 30 35 11Bronze 90 27 100 30 25 8Aluminum 200 61 300 93 60 18

Feeds for Various Materials (Using a High-Speed Steel Cutting Tool)

Table 47-2Rough Cuts

In.Rough Cuts

mmFinish Cuts

In.Finish Cuts

mm

Machine Steel .010-.020 0.25-0.5 .003-.010 0.07-0.25

Tool Steel .010-.020 0.25-0.5 .003-.010 0.07-0.25Cast iron .015-.025 0.4-0.65 .005-.012 0.13-0.30Bronze .015-.025 0.4-0.65 .003-.010 0.07-0.25Aluminum .015-.030 0.4-0.75 .005-.010 0.13-0.25

Krar, S. & Check, A. (1997). Technology of Machine Tools 5th. ed). Glencoe/McGraw-Hill. Waterville, OH.

Table 47-1, Page 1

4. Work through related, contextual math-in-CTE examples. Now let’s look at some other samples of how Cutting Speeds effect the RPM if different diameter shafts.

Look at Table 47 – 1, Lathe Cutting Speed, page 2, and solve the following problems, showing all of your work.

Table 47 – 1, page 2, now adds the additional task of calculating the RPM for different kinds of materials as well as now asking for a specific finish after the cut.

Problem 1. Calculate the RPM for a 4.000-inch diameter aluminum shaft using a rough cut feed rate with a HSS Tool Bit.   Problem 2. Calculate the RPM and Machine Time for a 3.000-inch diameter bronze shaft. You will have to face off the 3.000-inch bronze shaft on one end, and then you will be required to turn the O.D. to a new diameter of 2.1875 inches by 2.1875 inches long. Your maximum depth of cut to use is .030 with a finish cut rate of .006. Use a HSS Tool Bit.

Using the following formulas:Time = Distance / RateWhere Distance = Length of cutRate = Feed x RPMRPM = CS x 4/D

Show Table 47 – 1, page 2, at this point students are given the appropriate amount of time to complete the work sheet. Problem 1RPM = 200 x 4 / 4RPM = 200

Problem 2.RPM = CS x 4/DRPM = 100 x 4 / 3RPM = 133

Face cut Time = 3 / (.006 x 133)Time = 3 / 0.798Time = 3.759 min

Turning timeTime = 2.1875 / (.006 x 133)Time = 2.1875 / 0.798Time = 2.741 min per cut on length

Amount of material to remove

Major Diameter – Minor Diameter3.000 – 2.1875 = 0.8125

Number of cuts required to get to size0.8125 / .030 (depth of cut) = 27.083 cuts

Total turn time = Number of Cuts x Time per cut 76.748 mins. = 28 (cuts) x 2.741(cut time in mins.)

Total Machine Time = face time + turn time

Total Machine Time = 3.795 min. + 76.748 mins. = 80.543 mins.

5. Work through traditional math examples.Problem 1.In each problem, show the formula Distance = Rate x Time can be used to solve the following problem. Please be sure to show all of your work.We all know that Mr. Milton enjoys fishing and hunting but did you know he also loves to search for antique bottles. While attending a conference at Sunday River Resort, he was told there was an antique shop down the road a bit. After half an hour of driving at an average speed of 40 miles per hour, he pulls into a quaint little antique shop to begin his shopping experience.

Problem 2.Van Buren’s favorite machine tool teacher is also an avid hunter. During target practice, Mr Milton shot at a target 450 yards away. If the bullet travels 2900 (Feet Per Second) how much time did it take for the bullet to hit the target. This problem will also require you to make a conversion from yards to feet.

Distance = Rate X Time

= 40 (MPH) x (1/2)

= 20 Miles

Distance = Rate X Time

450 yards = 2900 fps (Feet Per Second) x Time

450 (3 feet) = 2900 fps x Time

1350 ft / 2900 fps = Time

0.466 seconds = Time

Show Video

Using the above charts calculate the proper feeds, and speeds, for the following problems using a HSS Tool Bit for all problems.

1. Face off one end of a 4” diameter Aluminum shaft, then turn the end of that shaft to a diameter of 2.550 by 3.000 long. Then turn the 2.550 diameter to a diameter of 1.9375 by 1.500 long, on one end of the shaft. Calculate the RPM to produce a finish machine process. Show all work.

2. Face off a 2.250 diameter Bronze shaft, then turn the shaft to a diameter of 1.9375 by .9375 long. Next turn the 1.9375 diameter to a new

diameter of 1.375 by .750 and produce a finish machine process. Show all work.

Rough Cut Finish Cut ThreadingMaterial ft/min m/min ft/min m/min ft/min m/minTool Steel 70 21 90 27 30 9Cast Iron 60 18 80 24 25 8Machine Steel 90 27 100 30 35 11Bronze 90 27 100 30 25 8Aluminum 200 61 300 93 60 18

Feeds for Various Materials (Using a High-Speed Steel Cutting Tool)

Table 47-2Rough Cuts

In.Rough Cuts

mmFinish Cuts

In.Finish Cuts

mm

Machine Steel .010-.020 0.25-0.5 .003-.010 0.07-0.25

Tool Steel .010-.020 0.25-0.5 .003-.010 0.07-0.25Cast iron .015-.025 0.4-0.65 .005-.012 0.13-0.30Bronze .015-.025 0.4-0.65 .003-.010 0.07-0.25Aluminum .015-.030 0.4-0.75 .005-.010 0.13-0.25

Krar, S. & Check, A. (1997). Technology of Machine Tools 5th. ed). Glencoe/McGraw-Hill. Waterville, OH.

Table 47 – 1, Page 2

450 yard shot

6. Students demonstrate their understanding. For the remaining time left in this lesson you will be given a print of a project. Upon receiving your print you will need to complete a Job Planning Sheet for that particular part and submit that to me.

You will have to identify your material that is required and follow through with your Job Planning Sheet and machine your part as required on your print.

You will be able to assess your work when you finish the project part by following the Evaluation Sheet on the back of your print.

After you have completed your evaluation sheet then you will have to complete your formal inspection of the part as well.

Show Job Planning Sheet.

The Job Planning Sheet has been covered in previous lesson plans.

Show a print that a first semester machinist might work on.

Show the assessment page on the back of the print.

7. Formal assessment. Your formal assessment will be done following the rubric designed for the task at hand. The rubric follows closely with the one that is printed on the back of each of the prints that you will receive. I will check the tolerances with you so that you can see just where if any, there is a problem. The part will be taken to the inspection table where it will be

The part will be taken to the inspection table where it will be inspected by the teacher with the student observing.

It will have to meet the tolerances listed on the print and if not listed they will have to meet the house standards. Each student is aware of these house standards and has a copy of these standards in their folders.

6. Students demonstrate their understanding. For the remaining time left in this lesson you will be given a print of a project. Upon receiving your print you will need to complete a Job Planning Sheet for that particular part and submit that to me.

You will have to identify your material that is required and follow through with your Job Planning Sheet and machine your part as required on your print.

You will be able to assess your work when you finish the project part by following the Evaluation Sheet on the back of your print.

After you have completed your evaluation sheet then you will have to complete your formal inspection of the part as well.

Show Job Planning Sheet.

The Job Planning Sheet has been covered in previous lesson plans.

Show a print that a first semester machinist might work on.

Show the assessment page on the back of the print.

7. Formal assessment. Your formal assessment will be done following the rubric designed for the task at hand. The rubric follows closely with the one that is printed on the back of each of the prints that you will receive. I will check the tolerances with you so that you can see just where if any, there is a problem. The part will be taken to the inspection table where it will be

The part will be taken to the inspection table where it will be inspected by the teacher with the student observing.

It will have to meet the tolerances listed on the print and if not listed they will have to meet the house standards. Each student is aware of these house standards and has a copy of these standards in their folders.

6. Students demonstrate their understanding. For the remaining time left in this lesson you will be given a print of a project. Upon receiving your print you will need to complete a Job Planning Sheet for that particular part and submit that to me.

You will have to identify your material that is required and follow through with your Job Planning Sheet and machine your part as required on your print.

You will be able to assess your work when you finish the project part by following the Evaluation Sheet on the back of your print.

After you have completed your evaluation sheet then you will have to complete your formal inspection of the part as well.

Show Job Planning Sheet.

The Job Planning Sheet has been covered in previous lesson plans.

Show a print that a first semester machinist might work on.

Show the assessment page on the back of the print.

7. Formal assessment. Your formal assessment will be done following the rubric designed for the task at hand. The rubric follows closely with the one that is printed on the back of each of the prints that you will receive. I will check the tolerances with you so that you can see just where if any, there is a problem. The part will be taken to the inspection table where it will be

The part will be taken to the inspection table where it will be inspected by the teacher with the student observing.

It will have to meet the tolerances listed on the print and if not listed they will have to meet the house standards. Each student is aware of these house standards and has a copy of these standards in their folders.

6. Students demonstrate their understanding. For the remaining time left in this lesson you will be given a print of a project. Upon receiving your print you will need to complete a Job Planning Sheet for that particular part and submit that to me.

You will have to identify your material that is required and follow through with your Job Planning Sheet and machine your part as required on your print.

You will be able to assess your work when you finish the project part by following the Evaluation Sheet on the back of your print.

After you have completed your evaluation sheet then you will have to complete your formal inspection of the part as well.

Show Job Planning Sheet.

The Job Planning Sheet has been covered in previous lesson plans.

Show a print that a first semester machinist might work on.

Show the assessment page on the back of the print.

7. Formal assessment. Your formal assessment will be done following the rubric designed for the task at hand. The rubric follows closely with the one that is printed on the back of each of the prints that you will receive. I will check the tolerances with you so that you can see just where if any, there is a problem. The part will be taken to the inspection table where it will be

The part will be taken to the inspection table where it will be inspected by the teacher with the student observing.

It will have to meet the tolerances listed on the print and if not listed they will have to meet the house standards. Each student is aware of these house standards and has a copy of these standards in their folders.